In King County, the proportion of 4th graders meeting state math standards varies greatly by school district and region.

In Washington State, the Smarter Balanced Assessments measure math and English language arts in grades 3 through 8 and 10. For the 2014-2015 school year, 63.8% of 4th graders in King County met math standards. In King County:

School District: Mercer Island School District had the highest proportion of 4th graders meeting math standards at 82.3%, while Tukwila School District had the lowest at 41.6%.

Race/ethnicity: Among students of various races and ethnicities, the proportion meeting math standards ranged from 79.3% of Asian students to 19.5% of American Indian/Alaska Native students.

Low-income: 4th graders who qualify for free or reduced-price school meals are considered low-income, and were less likely to meet math standards than those who were not considered low-income (40.1% vs. 75.3%).

Special education: Students in special education were less likely to meet math standards than those not in special education (33.9% vs. 68.0%).